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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 68, Iss. 4 — Apr. 1, 1978
  • pp: 429–431

Infrared band intensities in ammonium hydroxide and ammonium salts

P. P. Sethna, H. D. Downing, Lary W. Pinkley, and Dudley Williams  »View Author Affiliations


JOSA, Vol. 68, Issue 4, pp. 429-431 (1978)
http://dx.doi.org/10.1364/JOSA.68.000429


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Abstract

We have applied Kramers-Kronig analysis to reflection spectra to determine the optical constants of ammonium hydroxide and of aqueous solutions of ammonium chloride and bromide. From considerations of the absorption indices k (v) we conclude that ammonium hydroxide consists of a solution of NH 3 in water, in which NH3 molecules are hydrogen bonded to neighboring water molecules. The spectrum of ammonium hydroxide differs from the spectra of ammonium salts, in which bands characteristic of NH4+ ions are prominent. The existence of ammonium hydroxide as an aerosol in planetary atmospheres is briefly discussed.

© 1978 Optical Society of America

Citation
P. P. Sethna, H. D. Downing, Lary W. Pinkley, and Dudley Williams, "Infrared band intensities in ammonium hydroxide and ammonium salts," J. Opt. Soc. Am. 68, 429-431 (1978)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-68-4-429


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References

  1. J. S. Garing (private communication).
  2. H. D. Downing and D. Williams, "Optical Constants of Water in the Infrared," J. Geophys. Res. 80, 1656–1661 (1975).
  3. L. W. Pinkley, P. P. Sethna, and D. Williams, "Optical constants of water in the infrared: Influence of temperature," J. Opt. Soc. Am. 67, 494–499 (1977).
  4. P. P. Sethna, L. W. Pinkley, and D. Williams, "Optical constants of ammonium sulfate in the infrared," J. Opt. Soc. Am 67, 186–190 (1977).
  5. P. Rhine, D. Williams, G. H. Hale, and M. R. Querry, "Infrared Optical Constants of Aqueous Solutions of Electrolytes," J. Phys. Chem. 78, 238–246 (1974).
  6. G. Herzberg, Molecular Spectra and Molecular Structure (Van Nostrand, New York, 1945), p. 167.
  7. W. L. France and D. Williams, "Total absorptance of ammonia in the infrared," J. Opt. Soc. Am. 56, 70–74 (1966).
  8. C. W. Robertson and D. Williams, "Optical constants of liquid ammonia in the infrared," J. Opt. Soc. Am. 63, 188–193 (1973).
  9. C. W. Robertson, H. D. Downing, B. Curnutte, and D. Williams, "Optical constants of solid ammonia," J. Opt. Soc. Am. 65, 432–435 (1975).

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